| APA | QDCO. (2012, February 16). In Acronym Geek. Retrieved 19:57, February 16, 2012, from http://www.acronymgeek.com/QDCO |
| MLA | "QDCO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/QDCO>. |
| MHRA | 'QDCO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/QDCO> [accessed 16 February 2012] |
| Chicago | "QDCO", http://www.acronymgeek.com/QDCO (accessed February 16, 2012). |
| CBE/CSE | QDCO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/QDCO. |
| Bluebook | QDCO, http://www.acronymgeek.com/QDCO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QDCO, http://www.acronymgeek.com/QDCO (optional description here) (as of Feb. 16, 2012, 19:57). |
| AMA | QDCO. Acronym Geek. February 16, 2012, 19:57. Available at: http://www.acronymgeek.com/QDCO. Accessed February 16, 2012, 19:57. |